i have a 93 civic coupe and recently installed 390cc dsm injectors and a resistance box the prob is as soon as i start the car it floods out or it sounds like its hittin on 2 cyl i dont know what to do its a stock fuel system . even with new spark plugs the first time startin it flooded to the max.

 

What is your engine setup that requires 390cc injectors?
Do you have a fuel management component installed (Chipped ECU / VAFC II / AEM EMS) that will allow you to control the fuel?

You need to have an engine that will burn the amount of fuel that a 390cc per minute injector is going to fire into your cylinders. If you don't have a 200-240hp engine and you have no fuel management to reduce the injector duty cycle then your engine is going to flood. If your engine is stock these injectors will only need to be running at 60% duty cycle. That would have them runnign @ 234cc's right where you need them for a stock engine.